package com.atguigu.springcloud.filter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.util.Date;

@Component
@Slf4j
public class MyGateWayFilter implements GlobalFilter, Ordered {
	@Override
	public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
		log.info("come in global filter: {}", new Date());
		
		ServerHttpRequest request = exchange.getRequest();
		//表示参数中必须带有uname
		String uname = request.getQueryParams().getFirst("uname");
		if (uname == null) {
			log.info("用户名为null，非法用户");
			exchange.getResponse().setStatusCode(HttpStatus.NOT_ACCEPTABLE);
			return exchange.getResponse().setComplete();
		}
		// 放行
		return chain.filter(exchange);
	}
	
	/**
	 * 过滤器加载的顺序 越小,优先级别越高
	 *
	 * @return
	 */
	@Override
	public int getOrder() {
		return 0;
	}
}
